 /**
  * @fileoverview 百度地图的自定义信息窗口，对外开放。
  * 用户自定义信息窗口的各种样式。例如：border，margin，padding，color，background等
  * 主入口类是<a href="symbols/BMapLib.InfoBox.html">InfoBox</a>，
  * 基于Baidu Map API 1.2。
  *
  * @author Baidu Map Api Group
  * @version 1.2
  */
 /**
  * @namespace BMap的所有library类均放在BMapLib命名空间下
  */
 var BMapLib = window.BMapLib = BMapLib || {};
 //常量，infoBox可以出现的位置，此版本只可实现上下两个方向。
 var INFOBOX_AT_TOP = 1, INFOBOX_AT_RIGHT = 2, INFOBOX_AT_BOTTOM = 3, INFOBOX_AT_LEFT = 4;
 (function() {
     //声明baidu包
     var T, baidu = T = baidu || {version: '1.5.0'};
     baidu.guid = '$BAIDU$';
     //以下方法为百度Tangram框架中的方法，请到http://tangram.baidu.com 查看文档
     (function() {
         window[baidu.guid] = window[baidu.guid] || {};

 		baidu.lang = baidu.lang || {};
         baidu.lang.isString = function (source) {
             return '[object String]' == Object.prototype.toString.call(source);
         };
         baidu.lang.isFunction = function (source) {
             return '[object Function]' == Object.prototype.toString.call(source);
         };
         baidu.lang.Event = function (type, target) {
             this.type = type;
             this.returnValue = true;
             this.target = target || null;
             this.currentTarget = null;
         };

         baidu.object = baidu.object || {};
         baidu.extend =
         baidu.object.extend = function (target, source) {
             for (var p in source) {
                 if (source.hasOwnProperty(p)) {
                     target[p] = source[p];
                 }
             }

             return target;
         };
         baidu.event = baidu.event || {};
         baidu.event._listeners = baidu.event._listeners || [];
         baidu.dom = baidu.dom || {};

         baidu.dom._g = function (id) {
             if (baidu.lang.isString(id)) {
                 return document.getElementById(id);
             }
             return id;
         };
         baidu._g = baidu.dom._g;
         baidu.event.on = function (element, type, listener) {
             type = type.replace(/^on/i, '');
             element = baidu.dom._g(element);
             var realListener = function (ev) {
                     // 1. 这里不支持EventArgument,  原因是跨frame的事件挂载
                     // 2. element是为了修正this
                     listener.call(element, ev);
                 },
                 lis = baidu.event._listeners,
                 filter = baidu.event._eventFilter,
                 afterFilter,
                 realType = type;
             type = type.toLowerCase();
             // filter过滤
             if(filter && filter[type]){
                 afterFilter = filter[type](element, type, realListener);
                 realType = afterFilter.type;
                 realListener = afterFilter.listener;
             }

             // 事件监听器挂载
             if (element.addEventListener) {
                 element.addEventListener(realType, realListener, false);
             } else if (element.attachEvent) {
                 element.attachEvent('on' + realType, realListener);
             }
             // 将监听器存储到数组中
             lis[lis.length] = [element, type, listener, realListener, realType];
             return element;
         };

         baidu.on = baidu.event.on;
         baidu.event.un = function (element, type, listener) {
             element = baidu.dom._g(element);
             type = type.replace(/^on/i, '').toLowerCase();

             var lis = baidu.event._listeners,
                 len = lis.length,
                 isRemoveAll = !listener,
                 item,
                 realType, realListener;
             while (len--) {
                 item = lis[len];

                 if (item[1] === type
                     && item[0] === element
                     && (isRemoveAll || item[2] === listener)) {
                    	realType = item[4];
                    	realListener = item[3];
                     if (element.removeEventListener) {
                         element.removeEventListener(realType, realListener, false);
                     } else if (element.detachEvent) {
                         element.detachEvent('on' + realType, realListener);
                     }
                     lis.splice(len, 1);
                 }
             }

             return element;
         };
         baidu.un = baidu.event.un;
         baidu.dom.g = function (id) {
             if ('string' == typeof id || id instanceof String) {
                 return document.getElementById(id);
             } else if (id && id.nodeName && (id.nodeType == 1 || id.nodeType == 9)) {
                 return id;
             }
             return null;
         };
         baidu.g = baidu.G = baidu.dom.g;
         baidu.dom._styleFixer = baidu.dom._styleFixer || {};
         baidu.dom._styleFilter = baidu.dom._styleFilter || [];
         baidu.dom._styleFilter.filter = function (key, value, method) {
             for (var i = 0, filters = baidu.dom._styleFilter, filter; filter = filters[i]; i++) {
                 if (filter = filter[method]) {
                     value = filter(key, value);
                 }
             }
             return value;
         };
         baidu.string = baidu.string || {};

         baidu.string.toCamelCase = function (source) {
             //提前判断，提高getStyle等的效率 thanks xianwei
             if (source.indexOf('-') < 0 && source.indexOf('_') < 0) {
                 return source;
             }
             return source.replace(/[-_][^-_]/g, function (match) {
                 return match.charAt(1).toUpperCase();
             });
         };

         baidu.dom.setStyle = function (element, key, value) {
             var dom = baidu.dom, fixer;

             // 放弃了对firefox 0.9的opacity的支持
             element = dom.g(element);
             key = baidu.string.toCamelCase(key);

             if (fixer = dom._styleFilter) {
                 value = fixer.filter(key, value, 'set');
             }

             fixer = dom._styleFixer[key];
             (fixer && fixer.set) ? fixer.set(element, value) : (element.style[fixer || key] = value);

             return element;
         };

          baidu.setStyle = baidu.dom.setStyle;

         baidu.dom.setStyles = function (element, styles) {
             element = baidu.dom.g(element);
             for (var key in styles) {
                 baidu.dom.setStyle(element, key, styles[key]);
             }
             return element;
         };
          baidu.setStyles = baidu.dom.setStyles;
         baidu.browser = baidu.browser || {};
         baidu.browser.ie = baidu.ie = /msie (\d+\.\d+)/i.test(navigator.userAgent) ? (document.documentMode || + RegExp['\x241']) : undefined;
         baidu.dom._NAME_ATTRS = (function () {
             var result = {
                 'cellpadding': 'cellPadding',
                 'cellspacing': 'cellSpacing',
                 'colspan': 'colSpan',
                 'rowspan': 'rowSpan',
                 'valign': 'vAlign',
                 'usemap': 'useMap',
                 'frameborder': 'frameBorder'
             };

             if (baidu.browser.ie < 8) {
                 result['for'] = 'htmlFor';
                 result['class'] = 'className';
             } else {
                 result['htmlFor'] = 'for';
                 result['className'] = 'class';
             }

             return result;
         })();
         baidu.dom.setAttr = function (element, key, value) {
             element = baidu.dom.g(element);
             if ('style' == key){
                 element.style.cssText = value;
             } else {
                 key = baidu.dom._NAME_ATTRS[key] || key;
                 element.setAttribute(key, value);
             }
             return element;
         };
          baidu.setAttr = baidu.dom.setAttr;
         baidu.dom.setAttrs = function (element, attributes) {
             element = baidu.dom.g(element);
             for (var key in attributes) {
                 baidu.dom.setAttr(element, key, attributes[key]);
             }
             return element;
         };
         baidu.setAttrs = baidu.dom.setAttrs;
         baidu.dom.create = function(tagName, opt_attributes) {
             var el = document.createElement(tagName),
                 attributes = opt_attributes || {};
             return baidu.dom.setAttrs(el, attributes);
         };
         T.undope=true;
     })();

     /**
      * @exports InfoBox as BMapLib.InfoBox
      */

     var InfoBox =
     /**
      * InfoBox类的构造函数
      * @class InfoBox <b>入口</b>。
      * 可以自定义border,margin,padding,关闭按钮等等。
      * @constructor
          * @param {Map} map Baidu map的实例对象.
          * @param {String} content infoBox中的内容.
          * @param {Json Object} opts 可选的输入参数，非必填项。可输入选项包括：<br />
          * {<br />"<b>offset</b>" : {Size} infoBox的偏移量
          * <br />"<b>boxClass</b>" : {String} 定义infoBox的class,
          * <br />"<b>boxStyle</b>" : {Json} 定义infoBox的style,此项会覆盖boxClass<br />
          * <br />"<b>closeIconMargin</b>" : {String} 关闭按钮的margin    <br />
          * <br />"<b>closeIconUrl</b>" : {String} 关闭按钮的url地址    <br />
          * <br />"<b>enableAutoPan</b>" : {Boolean} 是否启动自动平移功能    <br />
          * <br />"<b>align</b>" : {Number} 基于哪个位置进行定位，取值为[INFOBOX_AT_TOP,INFOBOX_AT_BOTTOM]<br />
          * }<br />.
          * @example <b>参考示例：</b><br />
          * var infoBox = new BMapLib.InfoBox(map,"百度地图api",{boxStyle:{background:"url('tipbox.gif') no-repeat
           center top",width: "200px"},closeIconMargin: "10px 2px 0 0",enableAutoPan: true
           ,alignBottom: false});
      */
         BMapLib.InfoBox = function(map, content, opts) {

         this._content = content || "";
         this._isOpen = false;
         this._map = map;

         this._opts = opts = opts || {};
         this._opts.offset =  opts.offset || new BMap.Size(0,0);
         this._opts.boxClass = opts.boxClass || "infoBox";
         this._opts.boxStyle = opts.boxStyle || {};
         this._opts.closeIconMargin = opts.closeIconMargin || "2px";
         this._opts.closeIconUrl = opts.closeIconUrl || "close.svg";
         this._opts.enableAutoPan = opts.enableAutoPan  ? true : false;
         this._opts.align = opts.align || INFOBOX_AT_TOP;
     }
     InfoBox.prototype = new BMap.Overlay();
     InfoBox.prototype.initialize = function(map) {
         var me = this;
         var div = this._div = baidu.dom.create('div', {"class": this._opts.boxClass});
         baidu.dom.setStyles(div, this._opts.boxStyle);
         //设置position为absolute，用于定位
         div.style.position = "absolute";
         this._setContent(this._content);

         var floatPane = map.getPanes().floatPane;
         floatPane.style.width = "auto";
         floatPane.appendChild(div);
         //设置完内容后，获取div的宽度,高度
         this._getInfoBoxSize();
         //this._boxWidth = parseInt(this._div.offsetWidth,10);
         //this._boxHeight = parseInt(this._div.offsetHeight,10);
         //阻止各种冒泡事件
         baidu.event.on(div,"onmousedown",function(e){
             me._stopBubble(e);
         });
         baidu.event.on(div,"onmouseover",function(e){
             me._stopBubble(e);
         });
         baidu.event.on(div,"click",function(e){
             me._stopBubble(e);
         });
         baidu.event.on(div,"dblclick",function(e){
             me._stopBubble(e);
         });
         return div;
     }
     InfoBox.prototype.draw = function() {
         this._isOpen && this._adjustPosition(this._point);
     }
     /**
      * 打开infoBox
      * @param {Marker|Point} anchor 要在哪个marker或者point上打开infobox
      * @return none
      *
      * @example <b>参考示例：</b><br />
      * infoBox.open();
      */
     InfoBox.prototype.open = function(anchor){
         var me = this,poi;
         if(!this._isOpen) {
             this._map.addOverlay(this);
             this._isOpen = true;
             //延迟10ms派发open事件，使后绑定的事件可以触发。
             setTimeout(function(){
                 me._dispatchEvent(me,"open",{"point" : me._point});
             },10);
         }
         if(anchor instanceof BMap.Point){
             poi = anchor;
             //清除之前存在的marker事件绑定，如果存在的话
             this._removeMarkerEvt();
         }else if(anchor instanceof BMap.Marker){
         	//如果当前marker不为空，说明是第二个marker，或者第二次点open按钮,先移除掉之前绑定的事件
         	if(this._marker){
         		this._removeMarkerEvt();
         	}
             poi = anchor.getPosition();
             this._marker = anchor;
             !this._markerDragend && this._marker.addEventListener("dragend",this._markerDragend = function(e){
             	me._point = e.point;
             	me._adjustPosition(me._point);
             	me._panBox();
             	me.show();
             });
              //给marker绑定dragging事件，拖动marker的时候，infoBox也跟随移动
             !this._markerDragging && this._marker.addEventListener("dragging",this._markerDragging = function(){
             	me.hide();
             	me._point = me._marker.getPosition();
                 me._adjustPosition(me._point);
             });
         }
         //打开的时候，将infowindow显示
         this.show();
         this._point = poi;
         this._panBox();
         this._adjustPosition(this._point);
     }
     /**
      * 关闭infoBox
      * @return none
      *
      * @example <b>参考示例：</b><br />
      * infoBox.close();
      */
     InfoBox.prototype.close = function(){
         if(this._isOpen){
             this._removeMarkerEvt();
             this.remove();
          //   this._map.removeOverlay(this);
             this._isOpen = false;
             this._dispatchEvent(this,"close",{"point" : this._point});
             for(var indexNum in  document.getElementsByClassName('infoBox')){
                 if(document.getElementsByClassName('infoBox')[indexNum].parentNode){
                     document.getElementsByClassName('infoBox')[indexNum].parentNode.removeChild(document.getElementsByClassName('infoBox')[indexNum]);
                 }
             }
         }
     }

 	/**
    	 * 打开infoBox时，派发事件的接口
      * @name InfoBox#Open
      * @event
      * @param {Event Object} e 回调函数会返回event参数，包括以下返回值：
      * <br />{"<b>target</b> : {BMap.Overlay} 触发事件的元素,
      * <br />"<b>type</b>：{String} 事件类型,
      * <br />"<b>point</b>：{Point} infoBox的打开位置}
      *
      * @example <b>参考示例：</b>
      * infoBox.addEventListener("open", function(e) {
      *     alert(e.type);
      * });
      */
    /**
    	 * 关闭infoBox时，派发事件的接口
      * @name InfoBox#Close
      * @event
      * @param {Event Object} e 回调函数会返回event参数，包括以下返回值：
      * <br />{"<b>target</b> : {BMap.Overlay} 触发事件的元素,
      * <br />"<b>type</b>：{String} 事件类型,
      * <br />"<b>point</b>：{Point} infoBox的关闭位置}
      *
      * @example <b>参考示例：</b>
      * infoBox.addEventListener("close", function(e) {
      *     alert(e.type);
      * });
      */
   /**
      * 启用自动平移
      * @return none
      *
      * @example <b>参考示例：</b><br />
      * infoBox.enableAutoPan();
      */
     InfoBox.prototype.enableAutoPan = function(){
         this._opts.enableAutoPan = true;
     }
     /**
      * 禁用自动平移
      * @return none
      *
      * @example <b>参考示例：</b><br />
      * infoBox.disableAutoPan();
      */
     InfoBox.prototype.disableAutoPan = function(){
         this._opts.enableAutoPan = false;
     }
     /**
      * 设置infoBox的内容
      * @param {String|HTMLElement} content 弹出气泡中的内容
      * @return none
      *
      * @example <b>参考示例：</b><br />
      * infoBox.setContent("百度地图API");
      */
     InfoBox.prototype.setContent = function(content){
       	this._setContent(content);
       	this._getInfoBoxSize();
         this._adjustPosition(this._point);
     }
     /**
      * 设置信息窗的地理位置
      * @param {Point} point 设置position
      * @return none
      *
      * @example <b>参考示例：</b><br />
      * infoBox.setPosition(new BMap.Point(116.35,39.911));
      */
     InfoBox.prototype.setPosition = function(poi){
         this._point = poi;
         this._adjustPosition(poi);
         this._removeMarkerEvt();
     }
     /**
      * 获得信息窗的地理位置
      * @param none
      * @return {Point} 信息窗的地理坐标
      *
      * @example <b>参考示例：</b><br />
      * infoBox.getPosition();
      */
     InfoBox.prototype.getPosition = function(){
         return this._point;
     }
     /**
      * 返回信息窗口的箭头距离信息窗口在地图
      * 上所锚定的地理坐标点的像素偏移量。
      * @return {Size} Size
      *
      * @example <b>参考示例：</b><br />
      * infoBox.getOffset();
      */
     InfoBox.prototype.getOffset = function(){
         return this._opts.offset;
     },
     /**
    	 *@ignore
      * 删除overlay，调用Map.removeOverlay时将调用此方法，
      * 将移除覆盖物的容器元素
      */
     InfoBox.prototype.remove = function(){
         var me = this;
         if( this.V){
             this.V.parentNode.removeChild(this.V);
         }
        /* if(this.domElement && this.domElement.parentNode){
           //防止内存泄露
           baidu.event.un(this._div.firstChild, "click", me._closeHandler());
           this.domElement.parentNode.removeChild(this.domElement);
         }
         this.domElement = null;*/
        this.V = null;
         this._isOpen = false;
         this.dispatchEvent("onremove");
     },
     baidu.object.extend(InfoBox.prototype,{
         /**
          * 获取关闭按钮的html
          * @return IMG 关闭按钮的HTML代码
          */
         _getCloseIcon: function(){
             var img = "<img src='"+ this._opts.closeIconUrl +"' align='right' style='position:relative;right:0px;cursor:pointer; margin:"+ this._opts.closeIconMargin +"'/>";
             return img;
         },
         /**
 	     * 设置infoBox的内容
 	     * @param {String|HTMLElement} content 弹出气泡中的内容
 	     * @return none
 	     *
 	     * @example <b>参考示例：</b><br />
 	     * infoBox.setContent("百度地图API");
 	     */
         _setContent: function(content){
 	        if(!this._div){
 	            return;
 	        }
 	        var closeHtml = this._getCloseIcon();
 	        //string类型的content
 	        if(typeof content.nodeType === "undefined"){
 	            this._div.innerHTML = closeHtml + content;
 	        }else{
 	            this._div.innerHTML = closeHtml;
 	            this._div.appendChild(content);
 	        }
 	        this._content = content;
 	        //添加click关闭infobox事件
 	        this._addEventToClose();
    	    },
         /**
          * 调整infobox的position
          * @return none
          */
         _adjustPosition: function(poi){
             var pixel = this._getPointPosition(poi);
             var icon = this._marker && this._marker.getIcon();
             switch(this._opts.align){
                 case INFOBOX_AT_TOP:
                     if(this._marker){
                         this._div.style.bottom = -(pixel.y - this._opts.offset.height - icon.anchor.height + icon.infoWindowAnchor.height) - this._marker.getOffset().height + 2 + "px";
                     }else{
                         this._div.style.bottom = -(pixel.y - this._opts.offset.height) + "px";
                     }
                     break;
                 case INFOBOX_AT_BOTTOM:
                     if(this._marker){
           		        this._div.style.top = pixel.y + this._opts.offset.height - icon.anchor.height + icon.infoWindowAnchor.height + this._marker.getOffset().height + "px";
                     }else{
                         this._div.style.top = pixel.y + this._opts.offset.height + "px";
                     }
                     break;
             }

             if(this._marker){
                 this._div.style.left = pixel.x - icon.anchor.width + this._marker.getOffset().width + icon.infoWindowAnchor.width - this._boxWidth / 2 + "px";
             }else{
                 this._div.style.left = pixel.x - this._boxWidth / 2 + "px";
             }
         },
         /**
          * 得到infobox的position
          * @return Point  infobox当前的position
          */
         _getPointPosition: function(poi){
             this._pointPosition = this._map.pointToOverlayPixel(poi);
             return this._pointPosition;
         },
         /**
          * 得到infobox的高度跟宽度
          * @return none
          */
         _getInfoBoxSize: function(){
         	this._boxWidth = parseInt(this._div.offsetWidth,10);
         	this._boxHeight = parseInt(this._div.offsetHeight,10);
         },
         /**
          * 添加关闭事件
          * @return none
          */
         _addEventToClose: function(){
             var me = this;
             baidu.event.on(this._div.firstChild, "click", me._closeHandler());
             this._hasBindEventClose = true;
         },
         /**
          * 处理关闭事件
          * @return none
          */
         _closeHandler: function(){
             var me = this;
             return function(e){
                 me.close();
             }
         },
         /**
          * 阻止事件冒泡
          * @return none
          */
         _stopBubble: function(e){
             if(e && e.stopPropagation){
                 e.stopPropagation();
             }else{
                 window.event.cancelBubble = true;
             }
         },
         /**
          * 自动平移infobox，使其在视野中全部显示
          * @return none
          */
         _panBox: function(){
             if(!this._opts.enableAutoPan){
                 return;
             }
             var mapH = parseInt(this._map.getContainer().offsetHeight,10),
                 mapW = parseInt(this._map.getContainer().offsetWidth,10),
                 boxH = this._boxHeight,
                 boxW = this._boxWidth;
             //infobox窗口本身的宽度或者高度超过map container
             if(boxH >= mapH || boxW >= mapW){
                 return;
             }
             //如果point不在可视区域内
             if(!this._map.getBounds().containsPoint(this._point)){
                 this._map.setCenter(this._point);
             }
             var anchorPos = this._map.pointToPixel(this._point),
                 panTop,panBottom,panY,
                 //左侧超出
                 panLeft = boxW / 2 - anchorPos.x,
                 //右侧超出
                 panRight = boxW / 2 + anchorPos.x - mapW;
             if(this._marker){
                 var icon = this._marker.getIcon();
             }
             //基于bottom定位，也就是infoBox在上方的情况
             switch(this._opts.align){
                 case INFOBOX_AT_TOP:
                     //上侧超出
                     var h = this._marker ? icon.anchor.height + this._marker.getOffset().height - icon.infoWindowAnchor.height : 0;
                     panTop = boxH - anchorPos.y + this._opts.offset.height + h + 2 ;
                     break;
                 case INFOBOX_AT_BOTTOM:
                     //下侧超出
                     var h = this._marker ? -icon.anchor.height + icon.infoWindowAnchor.height + this._marker.getOffset().height + this._opts.offset.height : 0;
                     panBottom = boxH + anchorPos.y - mapH + h + 4;
                     break;
             }

             panX = panLeft > 0 ? panLeft : (panRight > 0 ? -panRight : 0);
             panY = panTop > 0 ? panTop : (panBottom > 0 ? -panBottom : 0);
             this._map.panBy(panX,panY);
         },
         _removeMarkerEvt: function(){
 			this._markerDragend && this._marker.removeEventListener("dragend", this._markerDragend);
             this._markerDragging && this._marker.removeEventListener("dragging", this._markerDragging);
             this._markerDragend = this._markerDragging = null;
         },
       	/**
 	     * 集中派发事件函数
 	     *
 	     * @private
 	     * @param {Object} instance 派发事件的实例
 	     * @param {String} type 派发的事件名
 	     * @param {Json} opts 派发事件里添加的参数，可选
 	     */
 	     _dispatchEvent: function(instance, type, opts) {
 	        type.indexOf("on") != 0 && (type = "on" + type);
 	        var event = new baidu.lang.Event(type);
 	        if (!!opts) {
 	            for (var p in opts) {
 	                event[p] = opts[p];
 	            }
 	        }
 	        instance.dispatchEvent(event);
 	    }
     });
 })();


